US3351409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light diffusion material, method of making and using same
Assignee: Individual
•
Filing: 1963-06-12
•
Granted: 1967-11-07
•
Expires: 1983-06-12
Abstract
No abstract record available.
Inventors
- 👤 Irvin H Mcguire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:41
CPC Classifications
H; H01; H01K; H01K1/00; H01K1/28; H01K1/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
A REAR PROJECTION VIEWING SCREEN CONSISTING ESSENTIALLY OF A SUBSTRATE COATED WITH A LIGHT-TRANSMITTING COMPOSITION MADE BY THE PROCESS CONSISTING ESSENTIALLY OF THE STEPS OF HEATING AND DEHYDRATING KAOLIN, CONTAINING ABOUT 33% ALUMINUM OXIDE, TO A TEMPERATURE FROM ABOUT 750* F. TO ABOUT 1800*F., THEREBY RAISING THE ALUMINUM OXIDE CONTENT TO ABOUT 47%, MIXING ABOUT TWO PARTS SAID KAOLIN BY VOLUME WITH ABOUT ONE PART ORGANIC SOLVENT BY VOLUME. TO FORM A SUSPENSION, CENTRIFUGING SAID SUSPENSION, 99%
Claim 2
Dependent Claim
77 words
A REAR PROJECTION VIEWING SCREEN CONSISTING ESSENTIALLY OF A SUBSTRATE COATED WITH A LIGHT-TRANSMITTING COMPOSITION MADE BY THE PROCESS CONSISTING ESSENTIALLY OF THE STEPS OF HEATING AND DEHYDRATING KAOLIN, CONTAINING ABOUT 33% ALUMINUM OXIDE, TO A TEMPERATURE FROM ABOUT 750* F. TO ABOUT 1800*F., THEREBY RAISING THE ALUMINUM OXIDE CONTENT TO ABOUT 47%, MIXING ABOUT TWO PARTS SAID KAOLIN BY VOLUME WITH ABOUT ONE PART ORGANIC SOLVENT BY VOLUME. TO FORM A SUSPENSION, CENTRIFUGING SAID SUSPENSION, 99%
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-06 | 1971-05-08 | 1971-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-06 | 1975-05-08 | 1975-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-06 | 1979-05-08 | 1979-11-07 | $7700.00 | Window Closed / Lapsed |